Extract price feed contract addresses to config

README.md

@@ -29,7 +29,8 @@ Vulcanize DB is a set of tools that make it easier for developers to write appli
 
 ## Configuration
 - To use a local Ethereum node, copy `environments/public.toml.example` to
-  `environments/public.toml` and update the `ipcPath` and `levelDbPath`.
+  `environments/public.toml` and update the `ipcPath`, `levelDbPath`, 
+  `pipContractAddress`, `pepContractAddress`, and `repContractAddress`.
   - `ipcPath` should match the local node's IPC filepath:
       - when using geth:
         - The IPC file is called `geth.ipc`.
@@ -51,7 +52,10 @@ Vulcanize DB is a set of tools that make it easier for developers to write appli
           - Linux: `$HOME/.ethereum/geth/chaindata`
       - `levelDbPath` is irrelevant (and `coldImport` is currently unavailable) if only running parity.
 
-- See `environments/infura.toml` to configure commands to run against infura, if a local node is unavailable.
+  - `pepContractAddress`, `pipContractAddress`, and `repContractAddress` should match that medianizer
+     addresses for each pair on the chain you're tracking. See https://makerdao.com/feeds/
+     
+- See `environments/infura.toml` to configure commands to run against infura, if a local node is unavailable
 - Copy `environments/local.toml.example` to `environments/local.toml` to configure commands to run against a local node such as [Ganache](https://truffleframework.com/ganache) or [ganache-cli](https://github.com/trufflesuite/ganache-clihttps://github.com/trufflesuite/ganache-cli).
 
 ## Start syncing with postgres
@@ -75,7 +79,7 @@ Sync VulcanizeDB from the LevelDB underlying a Geth node.
 Syncs VulcanizeDB with the configured Ethereum node, populating only block headers.
 This command is useful when you want a minimal baseline from which to track targeted data on the blockchain (e.g. individual smart contract storage values).
 1. Start Ethereum node
-2. In a separate terminal start VulcanizeDB:
+1. In a separate terminal start VulcanizeDB:
     - `./vulcanizedb lightSync --config <config.toml> --starting-block-number <block-number>`
 
 ## Backfill Auction event logs from light sync
@@ -87,6 +91,12 @@ _Since auction contracts have not yet been deployed, this command will need to b
 1. Start Ethereum node
 1. In a separate terminal run the backfill command:
   - `./vulcanizedb backfillAuctionLogs --config <config.toml>`
+  
+## Sync in light mode with MakerDAO price feeds
+Sync VulcanizeDB with the configured Ethereum node, populating block headers as well as price feeds for MKR/USD, ETH/USD, and REP/USD.
+1. Start Ethereum node
+1. In a separate terminal window start VulcanizeDB
+    - `./vulcanizedb syncPriceFeeds --config <config.toml> --starting-block-number <block-number>`
 
 ## Start full environment in docker by single command